Home / 10,079.21-15,121.25-9,911.84

Finding the Fourth Proportional to 10,079.21, 15,121.25 and 9,911.84

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Solution

The fourth proportional to 10,079.21, 15,121.25 and 9,911.84 is: 14,870.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,079.21 : 15,121.25 = 9,911.84 : x
  2. Step 2: Convert to fraction form
    10,079.21/15,121.25 = 9,911.84/x
  3. Step 3: Cross multiply
    10,079.21x = 15,121.25 × 9,911.84
  4. Step 4: Simplify right side
    10,079.21x = 149,879,361.04
  5. Step 5: Solve for x
    x = 149,879,361.04/10,079.21
  6. Step 6: Final answer
    x = 14,870.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.